Just to make it clear on how warranties work, I'll offer this:
You have a warranty and Chrysler writes the terms of your warranty. However, there is also the Magnuson Moss Act that has a bearing on what rights a buyer and seller have with respects to a warranty.
If you have a warranty, and you modify a product, the seller may not be liable for any repairs under warranty should the modification be the root cause of the failure.
Conversely, if you modify a product and that modification was not the root cause of a failure, the seller still has an obligation to honor the warranty.
How this works...let's say you put a tune on your car and some time later your audio head unit fails. The tune did not cause the failure and the warranty terms must be honored.
On the other hand, let's say you put a tune on your car and your transmission fails. The dealer can more than likely attribute the tune as the root cause and deny warranty repairs.
Three things to remember here:
1. the burden of proof of whether or not a modification caused a failure can fall equally on both parties.
2. A seller cannot blanket void your entire warranty simply because you modified a product. Again, a failure has to be directly attributed to a modification.
3. Remove your tune before you go to the dealer. This will help you avoid the entire discussion, time and money taken up with negotiating resolution to a warranty claim due to a modification.